Columbus Avenue Neighborhood Transportation Study

Columbus Ave. at Stockton St.



The Columbus Avenue Neighborhood Transportation Study was a joint effort of community partners Revitalize and Energize the Northeast and Waterfront of San Francisco (RENEW SF), the San Francisco County Transportation Authority (Transportation Authority), and a consulting team led by Nelson\Nygaard Consulting Associates (Nelson\Nygaard). The Study's objective was to identify changes to transportation infrastructure and policies that could enhance the livability and economic viability of the Columbus Avenue corridor, benefit residents, merchants and visitors, and enjoy broad community support. The Study area included Columbus Avenue between the Transamerica Pyramid and Ghirardelli Square. Read the Project Fact Sheet (PDF).

Final Report released

Download the January 2010 Final Report:

Complete Final Report (30.5MB PDF) Low-res version (9.6MB PDF)

High-res version, by section:

Front cover (PDF)
Table of Contents (PDF)
Executive Summary (PDF, 3.5MB)
Chapter 1 (PDF, 1MB)
Chapter 2 (PDF, 7.2MB)
Chapter 3 (PDF, 3MB)
Chapter 4 (PDF, 10MB)
Chapter 5 (PDF, 2.7MB)
Chapter 6 (PDF, 1MB)
Appendix (PDF, 6.6MB)

Community-Based Process

The Study included two rounds of public outreach, extensive data collection, and the development and evaluation of three conceptual design alternatives. A key objective of the Study was to identify and prioritize transportation needs from the community's perspective, and work with community partners to develop transportation improvements.

RENEW SF served as the primary liaison between the Transportation Authority and the many stakeholders with an interest in transportation issues in the study area by helping with publicity efforts, conducting event logistics, and co-hosting outreach events. The Chinatown Community Development Center provided a link to the Chinese-speaking stakeholders of Columbus Avenue, providing translation services and organizing outreach events for Chinese speakers. Read the complete summaries of public meetings and workshops:


Identified Priorities

RENEW SF and the Transportation Authority conducted technical analysis and community outreach to identify the top priorities for transportation improvements along Columbus Avenue. Stakeholders identified the following issues as top transportation priorities for Columbus Avenue:

  • Pedestrian conditions
  • Streetscape vitality
  • Transit service efficiency
  • Coordination with the planning for Central Subway
  • Parking management

Based on community input and technical analysis, the locations along Columbus identified as most in need are:

  • Intersection of Columbus with Green and Stockton
  • Intersection of Columbus with Union and Powell
  • Columbus Avenue between Broadway and Filbert

Stockton and Green Streets, existing and proposed

The study team conducted a scientific survey of pedestrians using Columbus Avenue during the weekday and weekend peak visitor periods.  We learned that transit and walking are the main modes used by both visitors and residents of the area, regardless of income.  Respondents' top dislikes include street congestion, slow transit, and parking availability, and their most preferred new investment would be in faster and more reliable transit service.  Read more of the findings in our Pedestrian Survey Report (1.2MB PDF).

The study team conducted a parking study which found that about 40% of drivers to Columbus Avenue pay nothing for parking, however, about 30% pay more than $10 to park.  This indicates that parking supply is bifurcated into under-priced on-street parking and relatively expensive off-street parking, which encourages drivers to circle for a free space. Read more of the findings and recommendations in the Parking Occupancy and Turnover Evaluation (2.3MB PDF).


Design Alternatives

Alternative 1: Four-lane with "flex lane"

  • Does not widen the sidewalks
  • Improves pedestrian crossings with bulb-outs
  • Retains four-travel lanes
  • Improves transit with bus bulbs
  • Allows use of the parking lane for cafe seating (a "flex lane")

Alternative 2: Two-lane with "flex lane"

  • Permanently widens sidewalk to 12-14'
  • Reduces number of travel lanes from two to one in each direction ("road diet")
  • Retains parallel parking
  • Improves pedestrian crossings with corner bulbs
  • Diagonal crosswalks at Stockton / Green enhance pedestrian connectivity

Alternative 3: Two-lane with "flex space"

  • Permanently widens sidewalk to 20' - 22'
  • Outer sidewalk zones serves pedestrians and loading ("flex space")
  • Removes parallel parking for passenger vehicles
  • Creates plaza at Stockton / Green


The Study Team evaluated the benefits and impacts of each Alternative based on technical assessment and community feedback. Alternative 3 provides the greatest benefits for pedestrians and to the Columbus Avenue street atmosphere.

Benefits and impacts chart


About Flex Lanes and Flex Space

1. Flex lanes: A Near-Term Approach to Sidewalk Widening

This concept is recommended in the City's Better Streets Plan. Café or restaurant owners may apply to the City for a permit to place tables and chairs in curbside parking spaces in front of their businesses, and the seating areas are kept separate from adjacent spaces and travel lanes using planters or other semi-permanent fixtures. Spaces may be used for parking part of the time, and café seating at other times. As each curbside parking space is approximately 160 square feet, several tables might fit into the space typically occupied by a single car, benefiting business owners as well as pedestrians, who gain additional space on sidewalks where seating is removed or relocated. There are approximately 72 curbside parking and loading spaces along Columbus between Broadway and Filbert.

2. Flex Space: Gaining Sidewalk and Managing Parking

Permanently widening the Columbus Avenue sidewalks enough to accommodate tables and chairs would require removing parallel parking, and accommodating deliveries through a flex space arrangement. A flex space is a sidewalk that allows trucks to park to load and unload. Parking management improvements Flex space implementation should be paired with to avoid worsening community frustrations with parking availability.

Examples of flex use of parking space


Study Team

RENEW SF and the Transportation Authority co-lead the plan. RENEW SF is a coalition of concerned citizens committed to improving the North East and waterfront sections of the city. The San Francisco County Transportation Authority supported the Columbus Avenue Neighborhood Transportation Study effort through technical assistance and oversight funded by the Proposition K Neighborhood Transportation Planning program. The Prop K half-cent local transportation sales tax program and New Expenditure Plan passed by voters in November 2003 dedicates a category of funding to support neighborhood transportation planning efforts that result in local transportation improvement projects based on widespread community involvement.

Technical Advisory Committee (TAC)

The Columbus Avenue Neighborhood Transportation Study was guided by an interagency technical advisory committee including community representatives, MUNI, Department of Parking and Traffic, Department of Public Works, Planning Department, Public Utilities Commission, Mayor's Office, and the Transportation Authority. The TAC met periodically to review technical materials and help coordinate inter-agency efforts.

Chinese language materials

Click on the links below for the following materials:

Contact Information

RENEW SF and the Transportation Authority would like to get your feedback on the Columbus Avenue design alternatives. Please fill out our on-line survey or contact RENEW SF or the Transportation Authority directly.

To learn more or to be added to the mailing list, visit the RENEW SF website:, contact the Transportation Authority by email, or call the Transportation Authority at 415-522-4800.